The participants with CFRD were older than the participants from the CF control group (33 vs. 30 years, p = 0.05), presented more often with exocrine pancreatic insufficiency and with 2 severe CFTR mutations (Supplementary Table 1) than the participants from the CF control group (p < 0.0001 and p = 0.003, respectively) (Table 1). Here, CFTR is linked to cystic fibrosis-related diabetes.